Sync 3CX contacts with CardDav protocol

[sarl19]

It would be necessary to develop a syncronization of bi-directional contacts with the CardDAV protocol, this would allow synchronizations with full open-source products. This syncronization should also be planned at least once a day.

 

[edossantos]

You can try implementing a CRM template for this using this guide:
https://www.3cx.com/docs/crm-integration/

However, this will not be a full bidirectional synchronization, only from the CRM to 3CX, and only when contacts call in.